diff --git a/Makefile b/Makefile
index ad55ae83..f679b1a3 100644
--- a/Makefile
+++ b/Makefile
@@ -76,7 +76,7 @@ CFLAGS += -I$(NRF51_SDK)/Include/
 CFLAGS += -I$(NRF51_SDK)/Include/ble/
 CFLAGS += -I$(NRF51_SDK)/Include/ble/ble_services/
 CFLAGS += -I$(NRF51_SDK)/Include/ble/device_manager/
-CFLAGS += -I$(NRF_S110)/s110_nrf51822_7.0.0_API/include
+CFLAGS += -I$(NRF_S110)/s110_nrf51822_7.3.0_API/include
 CFLAGS += -I$(NRF_S110)/Include/
 CFLAGS += -I$(NRF51_SDK)/Include/app_common/
 CFLAGS += -I$(NRF51_SDK)/Include/sd_common/
@@ -123,10 +123,10 @@ flash: $(PROGRAM).hex
                  -c "flash write_image erase $(PROGRAM).hex" -c "verify_image $(PROGRAM).hex" \
                  -c "reset run" -c shutdown
 
-flash_s110: $(NRF_S110)/s110_nrf51822_7.0.0_softdevice.hex
+flash_s110: $(NRF_S110)/s110_nrf51822_7.3.0_softdevice.hex
 	$(OPENOCD) -d2 -f $(OPENOCD_INTERFACE) $(OPENOCD_CMDS) -f $(OPENOCD_TARGET) -c init -c targets -c "reset halt" \
                  -c "nrf51 mass_erase" \
-                 -c "flash write_image erase s110/s110_nrf51822_7.0.0_softdevice.hex" \
+                 -c "flash write_image erase s110/s110_nrf51822_7.3.0_softdevice.hex" \
                  -c "reset run" -c shutdown
 
 flash_mbs: bootloaders/nrf_mbs_v1.0.hex
diff --git a/tools/build/download_deps b/tools/build/download_deps
index 5ae03e18..c0f105f7 100755
--- a/tools/build/download_deps
+++ b/tools/build/download_deps
@@ -18,8 +18,8 @@ if [ ! -f ${sdkZip} ]; then
 fi
 
 s110Dir=${root}/s110
-s110Zip=${s110Dir}/s110_nrf51822_7.0.0.zip
+s110Zip=${s110Dir}/s110_nrf51822_7.3.0.zip
 if [ ! -f ${s110Zip} ]; then
-    $(${download_cmd} ${s110Zip} http://www.nordicsemi.com/eng/nordic/download_resource/48420/8/62400196)
+    $(${download_cmd} ${s110Zip} https://www.nordicsemi.com/-/media/Software-and-other-downloads/SoftDevices/S110/s110nrf51822730.zip?la=en&hash=BB921F4E2B47C8BF4B87783ED0F5DC235FB70287)
     unzip -q ${s110Zip} -d ${s110Dir}
 fi